Manufactured by CHG Bearing, the NNU 4932 B/SPW33 is a precision Super-Precision Cylindrical Roller Bearings. Key dimensional parameters include a 160 mm bore diameter, a 220 mm outer diameter, and a 60 mm overall width. This component is designed to meet standard load requirements and ensure consistent operational performance. For comprehensive technical evaluation, please explore the detailed specifications, dimensional data, product images, and CAD drawings provided below. A complete PDF data sheet is also readily available for direct download to support your engineering and procurement needs.
NNU 4932 B/SPW33 - Super-Precision Cylindrical Roller Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | NNU 4932 B/SPW33 |
| Brand | CHG® |
| Characteristics | |
| Bearing Type | Super-precision Cylindrical Roller Bearing |
| Design Type | Cylindrical Bore |
| Structure (Drawing Reference) | Complete Bearing |
| Number of Rows | 2 |
| Ring Type | None |
| Design | NNU Design |
| Tolerance Class | SP |
| Bearing Material | Bearing Steel |
| Coating | None |
| Sealing | None |
| Lubricant | None |
| Features | Annular Lubrication Groove and Lubrication Holes |
| Number of Flanges – Outer Ring | 3 |
| Number of Ribs – Inner Ring | 0 |
| Dimensions | |
| Bore Diameter (d) | 160 mm |
| Width (B) | 60 mm |
| Outer Diameter (D) | 220 mm |
| Minimum Chamfer Dimension rmin | 2 mm |
| Inner Ring Chamfer | 2 mm |
| Outer Ring Chamfer | 2 mm |
| End-face Height Difference h | 2 mm |
| Outer-Ring Land Diameter (L2 / D1) | 200.9 mm |
| Inner Ring Raceway Diameter F | 178.5 mm |
| Shaft Shoulder Diameter dₐ, min. | 170 mm |
| Shaft Shoulder Diameter dₐ, max. – NNU Design | 176 mm |
| Shaft Shoulder Diameter dᵦ, min. – NNU Design | 182 mm |
| Housing Shoulder Diameter Dₐ, max. | 210 mm |
| Performance | |
| Basic Dynamic Load Rating C (kN) | 330 kN |
| Basic Static Load Rating C₀ (kN) | 680 kN |
| Limiting Speed – Grease (r/min) | 3600 r/min |
| Limiting Speed – Oil-air (r/min) | 4000 r/min |
| Reference Grease Quantity Gref (cm³) | 63 cm³ |
| Fatigue Load Limit Pᵤ (kN) | 72 kN |
| Axial Static Stiffness – Guideline Value (N/µm) | 4310 N/µm |
| Material | |
| Lubrication Groove Width | 5.5 mm |
| Lubrication Holes (qty × Ø mm) | 3 |
| Weight (kg) | 6.75 kg |
| Radial Internal Clearance | C1 mm |
| Internal Design & Weight | |
| Cage Type | Machined Metal Cage |
| Mounting Dimensions | |
| Lubrication Port Thread / Size Φ1 | 179.8 |
NNU 4932 B/SPW33 220 mm 160 mm 60 mm Frequently Asked Questions about NNU 4932 B/SPW33 Super-Precision Cylindrical Roller Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
Model NNU 4932 B/SPW33 is manufactured by CHG Bearing in standard Normal clearance (CN) for ambient temperature transmission, and C3 or C4 clearance for heavy duty applications. C3 clearance compensates for radial shrinkage caused by tight shaft press-fits (bore 160 mm) and steep thermal gradients between inner and outer rings.
As standard production, CHG Bearing subjects NNU 4932 B/SPW33 to precision bainite or martensite quenching, offering dimensional stability up to 120°C (248°F). For high-heat processing equipment, CHG Bearing also supplies custom S0 (150°C), S1 (200°C), or S2 (250°C) stabilization heat treatments upon request to prevent residual austenite transformation.
Every production batch of CHG Bearing NNU 4932 B/SPW33 Super-Precision Cylindrical Roller Bearings comes with complete traceability. Upon shipment, CHG Bearing can provide EN 10204 3.1 Material Test Reports (MTR), Certificates of Conformity (CoC), spectral chemical composition analysis, and dimensional inspection sheets.
Yes, 100% of NNU 4932 B/SPW33 Super-Precision Cylindrical Roller Bearings leaving CHG Bearing production lines are subjected to multi-frequency Anderometer sound testing. All units satisfy baseline Z1V1 levels, with dedicated quiet-running electric motor quality (EMQ) lots certified to Z2V2 and Z3V3 standards for silent machinery integration.
